<template>
<el-container class="home_container">
  <!-- 头部区域 -->
  <el-header>
    <div>
      <img src="../assets/xiyy.jpg" alt="">
      <span>电商后台管理系统</span>
    </div>
  <el-button type="info" @click= "logout">退出</el-button>
  </el-header>
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width= "isCollapse ? '64px' : '200px'">
      <div class="toggle_button" @click= "toggleCollapse">|||</div>
      <!-- 侧边栏菜单区域 -->
       <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse= 'isCollapse' :collapse-transition= 'false' router :default-active= 'activePath'>
      <!-- 一级菜单 -->
      <el-submenu :index="item.id + ''" v-for= "item in menulist" :key= "item.id">
        <!-- 一级菜单模板 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class= "iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
         <el-menu-item :index= " '/'+subItem.path + ''" v-for= "subItem in item.children" :key= "subItem.id" @click= "saveNavState('/'+subItem.path)">
            <template slot="title">
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template>
         </el-menu-item>
       </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 内容主体区域 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menulist: [],
      iconsObj: {
        125: 'el-icon-s-custom',
        103: 'el-icon-s-claim',
        101: 'el-icon-s-goods',
        102: 'el-icon-notebook-2',
        145: 'el-icon-s-platform'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有的菜单
   async getMenuList() {
    const { data: res } = await this.$http.get('menus')
    if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
    this.menulist = res.data
    // console.log(res)
    },
    // 点击按钮，切换菜单的折叠与展开
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存链接的激活状态
    saveNavState (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>
<style lang="less" scoped>
.home_container {
  height: 100%;
.el-header{
  background-color: #373c40;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    img {
      border-radius: 50%;
    }
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333644;
  .el-menu {
    border-right: none;
  }
  .toggle_button {
    background-color: #495064;
    color: #fff;
    line-height: 24px;
    text-align: center;
    font-size: 10px;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
}
.el-main {
  background-color: #eaedf1;
}
}

</style>
